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(No Model.) 2 Sheets-Sheet l. W. A. HANCB.

COFFEE MILL.

Patented Oct. '7, 1890.

, In Vezzor. k QV/f/Luff (No Model.) 2 Sheets-Sheet 2.

W. A. HANCE.

COFFEE MILL.

No. 437,856. Patented Oct. '7, 1890.

UNITED STATES PATENT OEEIcE.

WILLIAM A. I-IANOF., OF FREEPORT, ILLINOIS, ASSIGNOR TO THE WARNER MANUFACTURING COMPANY, OF SAME PLACE.

COFFEE-MILL.

SPECIFICATION forming part of Letters Patent No. 437,856, dated October 7, 1890.

Application filed August 17,1889. Serial No. 321,115. (No model.)

' citizen of the United States of America, re-

siding at Freeport, in the county of Stephenson and State of Illinois, have made certain new and useful Improvements in Coifee- Mills, of which the following is a description.

In the drawings presented herewith,wherein similar reference-letters indicate the same or corresponding parts, Figure l is a central vertical section of a coee-mill, illustrating certain forms of my improvements; Fig. 2, a view of the portion of the case or box of the mill to which the hopper is attached. Fig. 3

.is a detail View, partly in section, showing the manner in which the hopper may be fastened to the box. Fig. 4 is a view of a ring, the use of which is stated below. Fig. 5 is a plan view of the cover of the mill; Fig. 6, a similar View of the uncovered hopper; Fig. 7, a broken side view of the latter. Figs. 8 and 9 illustrate a modification.' Fig. 10 is a top View of the washer J, and Figs. ll and 12 are respectively a vertical section and a broken top view of a modification in the attachment of the handle.

This invention relates to the smaller class of coffee-mills, having for its object certain improvements in the devices employed for fastening the diiferent parts of these mills together, and also in the means provided for the adjustment of the relative positions of the grinding-surfaces, whereby the mill may be given additional strength and rigidity in these particulars and the cost of manufacture may at the same time be materially lessened.

To this end said invention consists in certain features of construction fully described below, and the essential characteristics of which are definitely pointed out in the claims appended hereto.

Referring to the drawings, the hopper A of the mill (see Fig. l of the drawings) is cast with a shoulder a, adapted to rest upon the top of the box, or, if it is desired to lower the hopper within the box, as here shown, upon a partition E therein, and upon the outer surface of the grinding-shell at a distance below the shoulder a sufficient to allow the partition E to be forced between I provide lugs a. of suiicient size to furnish a bearing upon the under surface of the partition E. The number of these lugs is immaterial and may be varied according to the judgment of the manufacturer; but I should recommend the use of at least two as necessary to obtain a firm grip upon the board E. The hole in this board, which is represented in Fig. 2, is notched at b b to receive the lugs a a', and in putting these parts together said lugs are passed through these notches and the hopper then given a twist, which carries the lugs away from the notches and prevents their return through them.

To secure a iirm hold upon the board, I provide an incline upon one of the bearing-surfaces, either upon the upper surface of the lug a or the under surface of the board E, where said lug bears upon it, so that as the hopper is twisted around the board E will be wedged between the shoulder a and lug a. This incline I prefer to form on the lug a', where I have lettered it a2, inasmuch as the board E is too easily indented for the purpose. This objection may be removed, however, if for any reason it should be considered desirable, by the use of an annular metal washer--such as is shown at C in Fig. 4 between the lug a. and the under surface of the board, and in this case I should recommend the placing of the inclined surface upon such washer, as seen at c c, so that the inclined nor wedging surface may be made as long, and hence as effective, as possible. When the incline is placed upon the lug a', as shown in Fig. 3, I make it quite steep, the lower end being rounded off at the corner a3 and the upper end terminating in a sharp angle a4. In twisting the board E upon the hopper the rounded corner a3 first meets the under surface of the board and is easily forced upon it. The wooden surface is pressed in by the incline a2, and as soon as the lug passes over it springs out behind the sharp angle a4 and effectually blocks the return of the lug over the same surface.

To fasten the dome or cover d upon the mill, I cast upon the upper rim of the hopper an outwardly-projecting iiange a5, Figs. 1, 6, 7, 8, and 9, with an inclined under surface a6, Fig.

IOO

7, and upon the annular ring D, Fig. 5, commonly used to support the rigid portion of the cover d, I provide two downwardly-projecting tongues d', turning inward at the bottom, so as to embrace the flange c5 between them and the ringD. (See Fig. l.) In applying4 the cover these tongues d are passed through notches a7 in the flange c5 and twisted around upon the inclined surfaces a6 as far as their strength will permit and there drop into slight depressions a8, Fig. 7, formed to re ceive them and prevent their return.

Figs. 8 and 9 show a modification of ymy improvement. Here a flat lug a9 is provided upon the hopper a short distance below the flange a5, and the tongue d is adapted to wedge between the flange 0.5 and the Vupper surface of the cover B. In this case the lug a9 may be passed below the board E in the nmanner described with reference to the lug d in Fig. 1, and the under surface of the tongue dis preferably inclined in the same way as the upper surface of said lug ct.

Anotherimprovement applies especially to the adjustment of the distance between the grinding-surfaces upon the grinding-shell F and burr G, Fig. l, which is necessary in order that the coffee may be ground either fine or coarse, as may be desired. Such adjustment has been commonly made by means of ascreW-thread and 'nut upon the central shaft of the mill. Idesire to avoid the constant annoyance due to the tendency of such nut to become loose, and to do this I have employed about the shaft H, Fig. l, and between a camshaped shoulder h thereon and the support or journal I, in which said shaft turns, a washer J, Figs. l and l0, the under surface of which is flat and adapted to turn easily upon the top of the journal I, and the upper surface of which bears a cam orinclinej, Fig. l0, fitted to the cam h upon the shaft I-I, so that when the washer is rotated in one direction the cam h will ride up the inclinej, raising the burr G up toward the shell F,an'd when rotated in the opposite direction will allow said burr to drop away from the shell. The washer is retained in any position desired by means of a pin K, rigid with the handle L and engaging with the washer by means o'f teeth j thereon.

In Fig. 1 the handle L is represented as cast integral with the shaft H. l

If for any reason it should be deemed best to cast the shaft H and handle L separately, they may be fastened together by means of the device shown in Figs. 1l and l2, where the lugs h2 upon the shaft are passed through grooves Z in the .handle and then turned around and dropped into notches Z in the same.

I claim as new and desireto secure by Letters Patent- Y l. In a coffee-milka hopper A, having the flange a5, notched at a7 and provided with an incline d", in combination with t-he cover dD,

bearing the tongues d', as and for thepurpose stated. I

2. In a coffeemill, a hopper Approvided with the iiange d5, in combination with the cover CZ D, bearing tongues d', adapted to be wedged beneath the flange d5, substantially as described. A Y

3. #In a coffee-mill, the combination of the hopper A, having the central journalvI, the shaft H', h'olding the burr G and bearing the cam h, and the washer J, provided with anA inclined face interposed between said journal and said cam, as and for the purpore stated. 4. In a coffee-mill, the combination of the hopper having the Asupporting-journal I, the shaft H, bearing the cam h and the lug h', and the washer J, provided with an inclined face and burr G, all constructed substantially as above set forth. Y

WILLIAM A. HAN CE. In presence ofy T. R. BARTLETT,

` O. J. ZIEGLER. 

